Gripping appliance for cop winding machines



April 5, 1932. E. zlNDl-:L 1,852,688

GRIPPING APPLIANCE FOR COP WINDING MACHINES Filed Nov. 19. 1929 1 l//l f Patented apr. 5, 1932 1,852,688

`UNITE STATES PATENT FFICE i ERNST ZINDEL, 0F ERiENBACIi, ZURICH, SWITZERLAND GRIPPING- APPLIANCE COP WINDING MACHINES .Application led November 19, 1929, Serial No. 68,372, and in Switzerland May 16, 15929.

This invention relates to a gripping appli- The carrier 3 of the feeler is at the same time 'ance for cop winding machines wherein, for guided on the rod 16 adjacent the bobbin so preventing an automatic rearward motion of that `its vertical position is assured. The thesame, a spring is arranged between arodguiding of support 3 is stopped when the t guided supporting' member .for a feeler device member l has finally left b-obbin 12 (addition and for a thread guide, and a gripping boss, al manual movement of member 3) and the comprising friction rollers. in comparison member 3 has completely reached the downwith balls serving for the same purpose, wardly offset portion 16 of the supporting rollershave the special advantage that, owing rod 16, whereupon the member 3 can tilt it to the uniform wear of their circumferential about the guide rod 1. This provides the to surface, the bearing surface of the guide rod necessary space for removing the full bobbin is preserved. l y 12 from the bobbin shaft 13, and at which Instead ofthe known friction rollers havtime an empty bobbin sleeve can be placed ing a convex bearing surface, in the gripping on the bobbin spindle 13. The support 3 is nfl appliance according to the invention friction then moved back manually `in the required t5 rollersV of a concave circumferential surface manner on rod 16, and the feeler 4 thus is adapted to the bearing surface of the guide brought into operative position. Vrod are provided. c The supporting member 2 carries in an e11- ln consequence thereof, a so-called line larged portion of its one end an inner sleeve 5 Contact of the friction rollers onithe guide secured thereto by means of a screw 18 and i'odpis effected, whereby the bearing surface having a conical inner circumference 5. of the latter remains permanently in perfect- The gripping boss 6 which is also slidably ly smoothcondition so that a good braking arranged on the guide rod 1 projects in the action of the gripping appliance is ensured at enlarged end portion of the supporting meme@ each point of the guide rod. Y ber 2. The inner end portion of the gripping 3 On the accompanying drawings an embodiL boss 6 is provided with three slots 7 which are ment of the invention is shown by way of eX- equally distributed over its circumference ample in which: and each of which accommodates a friction Fig. 1 is a general view of the cop winding roller 3, of a concave profile, to be laterally lil machine.' held therein. so

Fig. 2 of a longitudinal section of the gripllie'prole of the individual friction roller ping appliance, and 8 has a radius of curvature corresponding to Fig. 3 a cross-section of the same on the that of the guide rod 1 so that, along the eX- line III-III in Fig. 2. tentl concerned, line contact takes place be- 1 l On the Vguide rod 1 of circular cross-section Atween the friction rollers and the guide rod. the supporting member 2 of known construcrifhe exterior circumferential edges 8 of the tion is displaceably arranged which carries friction rollers 8 arerounded off in a manner the thread guide 3 and the easily rotatable to correspond to the oppositely disposed ta* feeler device 3 which, for instance, is provided pering surface 5 of the supporting member 2 i9 with a conical bore for the reception of the for the feeler device and threaded guide. au thread coil being formed on the spool 12 on The actuallypresent three friction rollers the shaft 13 of a cop winding machine 14 the 8 are interconnected in the axial direction friction wheel 15 of which is driven in known of the gripping boss by a common ring 9 manner, by means of a corresponding fricpassed through them. The said ring is inil tion wheel onfa main driving shaft, not shown. serted in a circumferential groove 10 of the U5 Arranged below the guide rod 1 is a supgripping boss 6. The compression spring porting rod 16, which supporting rod is a-tabutting on its one end against the supporting tached to the bearing collar 17 extending outmember 2 and on its other end against the lwardly from the cop winding machine le, gripping bosseiiects that the friction rollers im andsupports the free end of the guide rod 1. 3, on the one side, are pressed against the 100 guide rod l and, on the other side, against the tapering surface 5 of the inner sleeve 5, whereby an automatic rearward motion of the gripping appliance on the guide rod l is prevented.

It is assumed that the winding spindle is parallel to the guide rod l and is adapted to effect a reciprocating motion simultaneously with its rotation. In consequence of the pressure exerted by the spool on the feeler device or on the supporting ,member 2 respectively, during the forward motion of the'spool, the supporting member 2, every time when it occurs, is displaced to the right on the guide rod l, whereby the spring ll is compressed and, consequently, the gripping action of the friction rollers-8 on the boss 6 is released. As soon as the pressure of the spool on the supporting member 2 ceases, the displacement of .the ilatter is alsostopped and the supporting member 2 is then held fast in its new position .on the guide rod in that the spring 1l expands and, thereby, presses the boss 6 outward so that the :friction rollers 8 of the same are again firmly pressed against the guide rod l and the conical inner surface 5 of the inner sleeve 5. The .bea-ring surface of the guide rod l owing tothe line contact of the friction rollers 8, revolving about their Vares 9, remains perfectly intact without losing its smoothness. r-llhe braking action of the gripping appliance being permanently effective at every point along the guide rod is recognizable in that the .gripping appliance even in the beginning of the winding operation, i. e. at the first impulse of the winding spindle on the feeler device, remains stationary so as to resist of being pushed away.

I claim l. In a gripping appliance for cop winding machines, in combination with a guide rod, a supporting member arranged on the said guide rod, a. feeler device, a thread guide carried by said feeler device, the said feeler device and the said thread guide being connected to the said supporting member, a gripping boss carried by the guide rod, friction rollers arranged concentrically around the said gripping boss and g-uide rod, the circumferential surface of the said friction rollers being concave and conforming to the bearing surface of the said guide rod, of a spring, the said spring being inserted between the said supporting member and the said gripping boss so as to prevent an automatic rearward motion of the gripping device, a housing carried by the supporting member and into which the gripping boss extends and a .conical surface within said housing and with which said rollers cooperate f r gripping the guide rod upon movement in one direction.

2. In a gripping appliance forcop winding machines, in combination with a guide rod, a supporting member arranged on the said guide rod, a feeler device, a thread guide,

the said feeler device and the said thread guide being connected to the said supporting member and movable therewith, a gripping boss mounted on the guide rod, friction rollers arranged on the said gripping boss and concentrically arranged around the guide rod, the circumferential surface of the said rfriction rollers being concave and' conforming to the curved bearing surface of the said guide rod, a tapered sleeve carried by the supporting member and surrounding the gripping boss and rollers, the exterior circumferential edgesofthe said friction rollers being rounded off to correspond to and engaging oppositely disposed tapering surface of the said tapered sleeve forthe said feeler device-and the said thread guide, a spring, the said spring being inserted between the said supporting member and the said lgripping boss so as to yprevent an automatic rearward motion 4o f the gripping device.

3. The combination with a gripping device for cop winding machines,a guide'rod, a feeler device, ya gripping boss carried by tthe guide rod, a member carried bythe feeler device and housing vthe gripping boss, said member having a tapered bearing sleeve, of concentrically Tarranged rollers carried bythe gripping boss and engaging the Vguide rod', said rollershaving concave grooves conforming transversely to the curvature of the rguide rod, .said tapered sleeve being positioned whereby upon movement of the gripping boss and `rollers in one direction, it will engage said rollers and force them intoclose engagement with the guide rod.

l. Thecombination'with a gripping fdevice forL cop winding machines comprising a tapered' sleeve axially movable, a guide rod extending through said sleeve, a gripping boss carried by the guide rod and within the tapered sleeve, spring means for normally forcing .said sleeve and gripping boss in opposite directions, of concave concentrically arranged rollers carried by the gripping boss engaging :the guide rod at spaced points, said rollers having their outer ,portions in the path o f the tapered sleeve.

5. The combination with the tapered sleeve and gripping boss of a cop winding gripping device, said gripping boss being carried by a guide rod, of concentrically .arranged rollers having circumferential grooves conforming to and engaging the periphery yof the guide rod, said rollers having their outer portions in lthe path of the tapered sleeve whereby upon movement Vof said sleeve and' gripping member in one direction a gripping action takes place between the guide rod and tapered sleeve, and upon movement in .the opposite direction said gripping action is released.

6. The combination with a tapered sleeve and gripping boss .of a cop winding device, a guide rod on which vsaid gripping boss is mounted, of concentrically arranged rollers CII carried by said gripping boss, grooves in said rollers conforming transversely to the curvature of the guide rod and engaging the guide rod at spaced points, said rollers having their outer portions in the path of the tapered sleeve, said rollers having their outer edges charnfered according to the curvature ofthe tapered sleeve. Y

7. A device as set forth in claim 5, wherein the gripping boss is provided with an annular channel, and a split ring surrounds the gripping boss in the channel thereof and extends through the rollers.

In testimony whereof I have signed my name to this specification.

ERNST ZINDEL. 

